To be fair they ship a large number of IDEs and Toolbox makes managing them a lot easier. I mostly only use IDEA Ultimate and CLion but I use the others occasionally too for certain tasks but don't necessarily have them installed all the time. Toolbox is installed on all my machines so I can simply install what I need when I need it, i.e Datagrip to generate some nice diagrams of some random DB I need to look at, etc.

Well it makes it easier to manage rather than wrangling with multiple stand alone IDEs and versions